The application does not show brainwaves even though it looks connected?

Make sure all the metal sensor contacts are clean (forehead and ear clip). If necessary, use alcohol wipes to gently clean the sensors.

Make sure your ears and forehead are clean. For example, ensure that you remove makeup or wash your face from sweat. Also, it may be helpful to remove earrings.

Make sure all the contacts are making firm contact with the skin of your forehead and ear. Make sure there is no hair between the sensor and your skin.

When first putting on the headset, it can help if you use your fingers to squeeze the ear clip firmly down against your ear for several seconds. For many people, this can often help the metal contacts establish a steady signal in the initial stages of reading your brainwaves. Also, it may help to rub your earlobe with your fingers to warm up your ear, and then connect the earclip.